import sys
import numpy as np

read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

MOD = 10**9 + 7

N, L, R = map(int, read().split())

dp = np.zeros(60, np.int64)
dp[0] = 1
fct = 1
for n in range(N - 1):
    newdp = dp * n
    fct = fct * (n + 1) % MOD
    newdp[1:] += dp[:-1]
    dp = newdp % MOD

answer = 0
for i in range(60):
    if L <= (1 << i) <= R:
        answer += dp[i]

if L <= 0 <= R:
    answer += fct * (N - 1)

answer %= MOD

print(answer)